// 弹性布局
@mixin flex-box ($a, $b, $c) {
  display: -webkit-box; /* Chrome 4+, Safari 3.1, iOS Safari 3.2+ */
  display: -moz-box; /* Firefox 17- */
  display: -webkit-flex; /* Chrome 21+, Safari 6.1+, iOS Safari 7+, Opera 15/16 */
  display: -moz-flex; /* Firefox 18+ */
  display: -ms-flexbox; /* IE 10 */
  display: flex; /* Chrome 29+, Firefox 22+, IE 11+, Opera 12.1/17/18, Android 4.4+ */
  flex-wrap: $a;
  -webkit-justify-content:$b;
  justify-content:$b;
  -moz-box-pack:$b;
  -webkit--moz-box-pack:$b;
  box-pack:$b;
  align-items:$c;
  -webkit-align-items:$c;
  box-align:$c;
  -moz-box-align:$c;
  -webkit-box-align:$c;
}

@mixin same-box($px) {
  width: $px;
  height: $px;
}

@mixin height-center-line($px) {
  height: $px;
  line-height: $px;
}
